The different stages an animal or plant goes through during its life In plants this includes Pollination Fertilisation Fruit development Dispersal of seeds Germination What stages might this inc ID: 465760
Download Presentation The PPT/PDF document "Life Cycles" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Life CyclesSlide2
The different stages an animal or plant goes through during its life.
In plants this includes:
Pollination
FertilisationFruit developmentDispersal of seedsGerminationWhat stages might this include?
What is a lifecycle?Slide3
Animal life cycles include:
BirthGrowthReproductionDeath
There are many types of species of animals on the planet.
Fish Amphibians Reptiles BirdsMammals Invertebrates (eg Insects)
Animal
LifecyclesSlide4
These are the groups we will be looking at in more detail today:
MammalsReptilesAmphibiansInsects
Species GroupsSlide5
Most
mammals have very similar life cycles, with the individuals going through similar stages of development
:
Females give birth to live youngYoung looks like a miniature version of the adultFemale provides milk for the young to grow and
developAdults take care of the young
Reproduce through sexual reproduction involving sperm and egg.
MammalsSlide6
Lifecycle of a Mammal-HumansSlide7
Lifecycle of a Mammal-LionSlide8
Most reptiles lay eggs
Young looks like a miniature version of the adult
Generally, no parental care is given – the eggs/young are left to look after themselvesMost reptiles reproduce through
internal sexual
reproduction, involving sperm and eggs
ReptilesSlide9
Lifecycle of a CrocodileSlide10
Most amphibians lay eggsAfter hatching, amphibians usually go through a very different physical form (tadpole) before looking like an adult
Tadpoles and young frogs are not usually given any parental care
Most amphibians reproduce through external sexual reproduction, involving sperm and eggs
AmphibiansSlide11
Lifecycle of a FrogSlide12
There are two different types of insect life cycle:
Incomplete metamorphosis C
omplete
metamorphosis. Metamorphosis means a change of form. This means that the young look very different from the adult.
InsectsSlide13
This is shown by the less highly developed insects. The life cycle shows only three stages:
-EGG NYMPH-
resembles a miniature adult but is not able to
reproduce ADULTThis life cycle has the disadvantage that both nymph and adult often share the same food source. Therefore they can be in direct competition with one another for food. The advantage is that the vulnerable pupal phase is avoided.
Incomplete Metamorphosis
Examples include dragonflies, grasshoppers, earwigs and cockroaches.Slide14
Lifecycle of a GrasshopperSlide15
This is shown by the more highly developed insects. The life cycle shows four
stages:EGGLARVA- or caterpillar
is the growth phase
PUPA- or chrysalis is a stage of internal reorganisationADULTUsually the larva and adult use different food sources. Therefore they are not in direct competition. This is a distinct advantage as
more individuals of the species can be fed.
Complete MetamorphosisExamples include butterflies, moths, bees, wasps, true flies and many other insects, including beetles:-Slide16
Lifecycle of the Monarch ButterflySlide17
Some
baby spiders (spiderlings) eat the mother spiders as they grow up.
Some female spiders eat the male after
mating.Some parasitic wasps lay their eggs in the head of ants. When the eggs hatch the baby wasps eats the ants from the inside out.
Amazing Lifecycles
Black widow devours her mate
Black lace-weaver cannibalise their mother
Eucharitid
wasps are parasitic Slide18
Kangaroos have very tiny
babies called joeys.The joey is born at a very immature stage and is only about 2cm long.
After their birth they crawl into the
mother’s pouch where they feed and grow and continue to develop.These mammals are called marsupials. Examples of other
marsupials are koalas,wombats, opossums
the Tasmanian devils Amazing Lifecycles- KangarooSlide19
A life span begins with an animal
’s birth and ends with its death.
Life spans
Animal
Life span
Vampire bat14 yearsChimpanzee44 yearsKangaroo6 years
Crocodile70 + yearsDog20 yearsButterfly1 month
Grasshopper
1 year
Frog
11 years
Lion
12 years
Owl
60 years
Elephant
60 years
Human lifespan can
vary greatly depending
on where a person
lives. In the UK a person is expected to live for about 80 years.
Life span of animals in captivity is longer. Slide20
Write a report on the life cycle of an animal of your choice that you have researched.
Complete for homework.Make sure you include the following:
Name the different stages of it’s lifecycle with a description of each stage.
Information about how the animal reproduces.Lifespan2 more interesting facts about your animal.Pictures and good presentation.Good spelling and grammar.Task